there are no windows leaving little chance for law enforcement to get a shot into the rolling fortress. but heemeyer has to come up with another way to see. >> he placed several cameras at different locations outside of the bulldozer, just pinhole cameras so that he was able to actually drive the thing using a closed-circuit tv video system. >> with heemeyer demolishing the town and help still a long way from arriving trainor devices a plan to try to stop the destruction. >> we cannot stop this vehicle, this tank, from going from where it wanted to go. i then remembered a video i had seen of a tank in san diego where the sheriff's deputies had actually entered the tank from the top through a port hole and then killed the driver. >> it's a risky move and apparently one that heemeyer had planned for. >> mr. heemeyer had taken axle grease and had greased the entire side of the tank. so that, you know, if he tried to get on top, you would just slip off. i was able to stick my fingers in between a couple of pieces of metal that had an exposed space and was able to eventually get on top of t